Stationary exercise apparatus



FIG. 1 is a top and front perspective view of a stationary exercise apparatus showing my new design;

FIG. 2 is a top plan view thereof;

FIG. 3 is a side view thereof, the unshown opposite side being of mirror-image appearance; and,

FIG. 4 is a front view thereof. 

The ornamental design for a stationary exercise apparatus, as shown and described. 